{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid character in identifier (<ipython-input-34-2bcec5dd8198>, line 24)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-34-2bcec5dd8198>\"\u001b[1;36m, line \u001b[1;32m24\u001b[0m\n\u001b[1;33m    print(\"您的余额还有：\"，Aliapy)\u001b[0m\n\u001b[1;37m                         ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid character in identifier\n"
     ]
    }
   ],
   "source": [
    "#优化\n",
    "product_list=[\n",
    "    [\"自行车\",299],\n",
    "    [\"iphone 14 pro\",8000],\n",
    "    [\"NFT盲盒\",28],\n",
    "    [\"许老师的python书\",80]\n",
    "]\n",
    "shopping_car=[]\n",
    "Alipay = input(input(\"请输入余额：\"))\n",
    "print(\"--------商品列表--------\")\n",
    "for i in range(4):\n",
    "    print(\"商品编号:+str(i),product_list[i]\")\n",
    "user_choice = input(\"请输入商品编号：\")\n",
    "if user_choice.isdigit():\n",
    "    #判断钱够不够，商品是谁？==>product_list[user_choice][1]\n",
    "    if Alipay >= product_list[int(user_choice)][1]:\n",
    "        Alipay=Alipay-product_list[int(user_choice)][1]#买完商品剩余的钱\n",
    "        print(\"您购买的商品已增加到购物车~~您的余额还有：\",Alipay)\n",
    "    else:\n",
    "        print(\"您的余额已不足，请更换支付方式\")\n",
    " #情景2：用户输入\"q\"，退出购买\n",
    "elif user_chioce ==\"q\":\n",
    "    print(\"您的购物车：\",shopping_car)\n",
    "    print(\"您的余额还有：\"，Aliapy)\n",
    "    break\n",
    "else:\n",
    "    print(\"您输入的商品不存在或输入有误，请重新尝试\")\n",
    "\n",
    "\n"
   ]
  },
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  {
   "cell_type": "code",
   "execution_count": null,
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